Red Spotted Purple Butterfly

Quiet butterfly feeding on sedum in my back garden, allowed 30 shots (very unusual for this type - they normally just flutter).
http://www.butterfliesandmoths.org/species/Limenitis-arthemis-astyanax
Family Brushfoots, Nymphalidae Sub: Admirals, Limenitidinae Wingspan: 76 to 102mm (3 to 4 inch) Above: Dark Velvety bluish black with iridescent blue scaling on hindwing and small orange and white spots near forewing apex Below: Brownish black with an iridescent blue sheen and basal red orange spots; hindwings have a row of red / ornge spots toward the apex. Sex: similar Host plant: Black cherry, wild cherry and willow. Mimics toxic Pipevine Swallowtail to gain protection from predators. Likes rotten fruit, dung and tree sap.